1. What is a container?
Container (Container) refers to a large loading container with particular strength, rigidity, and specifications for turnover. It is a kind of cargo transportation equipment that is easy to use for mechanical loading and unloading and can be used repeatedly for a long time—also known as a “container” or “container”.
2. What conditions can be called a container?
Containers used for the transportation of goods should meet the following conditions:
- Fully or partially closed to form a warehouse for loading goods.
- It is permanent, so it is strong enough to be used repeatedly.
- It is specially designed to facilitate the use of one or more modes of transport to carry goods without the need to be reloaded halfway (that is, trans-shipment goods by container, can be loaded directly at the consignor’s warehouse, shipped to the consignee’s warehouse for unloading, no need to remove the goods from the box for replacement).
- It is designed for easy loading and unloading, especially when moving from one mode of transportation to another.
- It is designed to be easy to fill and unload cargo.
- The internal volume is one cubic meter or more.
3. What is a refrigerated shipping container?
A refrigerated shipping container (Refrigerated Sea Container) is a closed container with refrigeration equipment and low heat conductivity material laid on the inner wall to transport fresh fish, fresh meat, frozen food, fruits, vegetables, film, medicine, and other goods that need to maintain a certain temperature.
Refrigerated shipping container can be used for intermodal transportation by various means of transportation. It can be used as portable cold storage under certain conditions and hoisted in the whole box, with high loading and unloading efficiency and relatively low transportation costs. The increased utilization rate of loading volume, flexible operation scheduling, and intense use economy. Refrigerated shipping containers are also divided into refrigerated containers and insulated containers.
(1) Refrigerated containers are generally equipped with a built-in refrigeration device at the front end of the container. When the freezer is working, the cold air is blown out of the ventilation pipe at the rear end of the box. Through the gap between the protrusions on the box wall and the ventilation guide rail at the bottom of the box, the cold air suction inlet on the front end wall is returned to the freezer for circulation.
To improve the cooling effect, the walls, roof, and bottom of the entire reefer container are covered with insulation materials. The operating temperature of the reefer container is between -28℃~+26℃. According to the needs of the goods, they can be automatically adjusted to keep the temperature in the container unchanged.
(2) Insulated containers are mainly used to load fresh goods such as fruits and vegetables. Refrigerants such as dry ice are generally used to prevent excessive temperature in the box; the usual insulation time is about 72 hours. The inside of the box is fully heat-proof all around and above.
4. Brief introduction of refrigeration and control technology of refrigerated shipping container
- The new refrigeration box of refrigeration system gradually adopts scroll compressor and frequency conversion technology to achieve efficiently, energy-saving refrigeration and flexible control of refrigeration capacity; super cold package with secondary refrigeration technology, can reach -60℃ low temperature; double refrigeration unit, can work alone or at the same time, both increase the refrigeration capacity and provide double safety guarantee.
- Control system The new cold box adopts a controllable program microprocessing control system, which has the functions of temperature setting, temperature control, defrosting, temperature display, temperature recording, alarm, etc., to achieve intelligent management of the cold box and continuous recording of working status.
- The dehumidification system reduces the temperature inside the box according to the unique requirements of the goods to maintain the optimum temperature range so that the goods can be transported in the most suitable environment. However, it should be noted that the system can only reduce the humidity of the air in the box, not increase it.
Air systems have both “primary air conditioning” and “continuous air conditioning” methods, which are used to regulate or control the concentration of oxygen, nitrogen, carbon dioxide, ethylene, or other trace gases in the air in the box during the transportation of fresh fruits, vegetables, and flower bulbs, to delay the maturation of goods, keep them fresh and increase the shelf life of goods on the market.
5. Refrigerated shipping container refrigerated goods
1. Frozen goods
Frozen livestock and poultry meat: Livestock and poultry meat instruments mainly include cattle, sheep, pigs, chickens, ducks, goose, etc. Fixed storage is an ancient and traditional method of preserving perishable goods. Usually, meat reaches a dormant state below -18℃, but low temperatures down -23℃ can extend the refrigeration period exponentially more than -18℃.
2. Frozen fish and aquatic products
Fish and aquatic products mainly contain water, protein, fat, minerals, enzymes, and vitamins. The storage time of fish and marine products is closely related to temperature. Under normal conditions, for every ten °C decreases in temperature, the freezing period increases threefold. Fatty fish have a shorter freezing period for low-fat fish and shorter freezing periods for muscular redfish.
3. Chocolate products
Chocolate should be packed in a clean, odorless cold box and transported at the right temperature. Low temperatures ensure quality. Shippers often ask to check that the humidity is set to 65%. Depending on the variety of chocolate, the temperature is usually placed between 8℃ and 18℃.
4. Temperature-controlled goods
Temperature-controlled goods refer to these goods that require a stable temperature during transportation, such as film, medicine, and food. To avoid caking and deterioration, the temperature is set between -2℃ and 30℃. Goods should be precooled to transport temperature before packing.
5. Dangerous and injurious goods
Cold boxes maintain high standards for transporting dangerous or sensitive goods and maintain quality. This unique cooler box is distinguished by a particular color and logo.
6. Mixed packing of refrigerated goods in LCL
Generally, you should avoid mixing various fresh-keeping fruits and vegetables in LCL. Due to volume, variety, and cost, the temperature should be paid attention to when shipping in LCL, which is the primary condition for fruit and vegetable LCL mixing.
Fruits and vegetables mixed in LCL, the closer the refrigeration temperature is, the better because fruits and vegetables are susceptible to temperature changes, low temperatures can reduce breathing intensity. Still, too low temperatures will cause freezing hazards; high temperatures not only increase breathing intensity accelerate ripening but also reduce corrosion resistance, spots, and discoloration occur.